Extension mining-post



(No Model.)

J. J. SULLIVAN.

EXTENSION MINING POST.

Patented Aug. 3,1897.-

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UNITED STATES PATENT OFFICE.

JOHN J. SULLIVAN, OF RED JACKET, MICHIGAN.

EXTENSION MINING-POST.

SPECIFICATION forming part of Letters Patent No. 587,463, dated August3, 1897.

Application led April 20, 1897.

T a/ZZ whom it mcw/ concer/z.-

Be it known that I, JOHN J. SULLIVAN, a citizen of the United States,residing at Red Jacket, in the county of Houghton and State of Michigan,have invented certain new and useful Improvements in Extension Mining-Posts; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to extension miningposts; and it consists,essentially, of a supporting member having an adjustable section mountedtherein, together with the details of construction and arrangement,which will be more fully hereinafter described and claimed.

The object of the present invention is to provide a post which isespecially adapted for use in mines to support operating mechanism, suchas drills and other devices, at

varying elevations, the parts being simple and effective in theirconstruction and operation, strong and durable, and comparativelyinexpensive in the cost of manufacture.

In the accompanying drawings, Figure 1 is a perspective view of theimproved post. Fig. 2 is a section on the line of Fig. 1. Fig. 3 is abottom plan view of the post.

Referring to the accompanying drawings, wherein similar numerals ofreference are employed to indicate corresponding parts in the severalviews, the numeral 1 designates a base of sufficient lateral extent toprovide a stable support and having rising therefrom a hollow standard2. Inside of the standard and resting on or forming part. of the saidbase is a bearing 3, having a vertically-disposed screw-threaded opening4, extending therethrough and alining with an opening in the base l, thelatter being constructed with radially-arranged lugs 5extending inwardlya suitable distance from the periphery of said base for a purpose whichwill be presently referred to. Adjustably fitted in the hollowstandard 2is a section 6, having a head '7, with an upperrough'ened or serratedsurface 8 to bite into a wall or support either of the material beingmined or a part of the mine-framing. The said section 6 is also formedwith oppositely-situated grooves 9, which are engaged byinwardly-extending Serial No. 632,929. (No model.)

tongues 10 on the interior of the standard 2 to hold the said section 6against rotation and f ing held in proper position above the standard 2by the collar 11. Vithin the standard 2 and extending upwardly therefromis a screw 13, which also passes through a bearing 14 in the lower endof the section 6, and by means of said screw the said section 6 isadjusted vertically and prevented from turning in its adjustment by itsgrooves 9 engaging the tongues in the sleeve 12, collar 11, and theupper part of the standard 2. The head of the screw 13 is located in thecentral portion of the base, arecess 15 being provided at this point toreceive said head in such manner as to avoid exteriorprojection orextension of any part thereof beyond the horizontal resting plane ofsaid base. The head of the said screwis angular and is adapted to beoperated by a box-wrench, and after an adjustment has been attained aslotted key 16 is mounted thereover and has an arm 17 pro-.

jecting therefrom, which is placed between two of the radial lugs 5 tohold the screw stationary after an adjustment thereof has been secured.

The parts of the device as an entirety are easily assembled anddisconnected, and by removing the collar 8, which also supports thescrew, the other devices may be readily separated. The section 6 ishollow throughout the greater portion of its length, and the head 7 issolid, to provide a rigid resistance at this point against fracture by apressure exerted thereon. The upper part of the sleeve 12 is also hangedat its upper end, as at 18, and the head can rest thereon whensufficiently lowered as an additional reinforcement, and between aportion of the radial lugs 5 on the base l an opening 19 is provided,which may be made large enough to insert a wrench therethrough to engagethe head of the screw 13, or the projecting end of the arm 17 of the keycan be used for this purpose and after- IOO ward secured by two of saidlugs, as indicated. The collar l1 prevents the sleeve 12 from movingdownwardly when the mechanism is attached thereto, and when the sleeveis adj usted vertically the collar is also moved and forms a resttherefor.

The simplicity, efficiency, and cheapness of the herein-describedconstruction will be apparent to any one skilled in the art, and it isalso obviously apparent that many minor changes in the details ofconstruction and arrangement might be made and substituted for thoseshown and described without in the least departing from the nature orspirit of the invention.

Having thus described the invention, what is claimed as new is- In amining-post, the combination of a standard having a base with a seriesof radial zo lugs thereon and a central recess, a movable sectionmounted in the said standard and having grooves in the opposite side ofthe same, a sleeve on the said movable section, a collar surrounding`the upper part of the standard, said standard, collar and sleeve havinginwardly-extending tongues to engage the opposite grooves of thel saidmovable section, a screw extending upwardly'through the base of thestandard into the movable section, and a key having an arm and adaptedto be iitted over the head of the screw and lock the same againstmovement, substantially as and for the purposes specified.

In testimony whereof I have signed this speciiieation in the presence oftwo subscribing Witnesses.

J Ol-IN J. SULLIVAN.

Vitnesses:

DENNIS SULLIVAN, BERT TAYLOR.

